Types and comparison of drainage materials
Natural sand or gravel drainage materials may cause some engineering problems due to the instability of construction and material, and the laying of slope materials beyond a certain angle becomes a big problem. As the rainwater seepage drainage layer, it will occupy a lot of storage yard space. On the other hand, the mining of materials will cause new environmental damage.
If the sand and gravel are used in the slope drainage system, if the slope exceeds a certain angle, the fixation of the drainage layer will be very difficult, or even impossible. Because the ordinary double-rib drainage network of the geotextile will be embedded in the drainage channel under a certain pressure, the drainage performance will decrease with the passage of time. The double-rib drainage network cannot withstand the continuous high pressure load and the decline of the geotextile embedded in the drainage channel, and the three-dimensional drainage network can overcome various problems of natural drainage materials and double-rib drainage network.
